3.4. Lubrication system

Fig. 2.9. Scheme of lubricant system of the engine: 1 – oil pump; 2 – stopper of a drain opening of a case; 3 – oil receiver; 4 – reducing valve; 5 – an opening for greasing of distributive gear wheels; 6 – sensor of an alarm lamp of emergency pressure of oil; 7 – sensor of the index of pressure of oil; 8 – crane of the oil heater; 9 – oil heater; 10 – full-line filter of purification of oil

The scheme of lubricant system is shown in fig. 2.9.
Oil pressure in lubricant system of the heated-up engine with a small frequency of rotation of a bent shaft (550–650 min.-1 – for engines of models 414, 4178; 700–750 min.-1 – for model 4218) engines idling at an open faucet of the oil heater have to be not less than 39 kPa (0,4 kgfs/cm2); on not heated-up engine pressure can reach 441–490 kPa (4,5–5,0 kgfs/cm2); at a speed of car of 45 km/h pressure has to be 196–392 kPa (2,0 - 4,0 kgfs/cm2), and in a hot flying weather not less than 147 kPa (1,5 kgfs/cm2).
Pressure in lubricant system of less specified sizes testifies to malfunction in the engine. Operation of the engine at the same time has to be stopped before malfunction elimination.
For cooling of oil in lubricant system the oil heater which is turned on is installed, opening the crane, at air temperature above 20 °C. At lower temperatures the radiator has to be disconnected. However, irrespective of air temperature, at the movement under trying conditions (with big loading and high frequency of rotation of a bent shaft of the engine) it is also necessary to open the crane of the oil heater.

Fig. 2.1. Engine (left-side view): 1 – filter of thin purification of fuel; 2 – cover of an oil-filling mouth; 3 – index of level of oil; 4 – cover of yokes; 5 – head of the block of cylinders; 6 – sensor distributor; 7 – starter; 8 – couplings; 9 – lower part of a case of coupling; 10 – fuel pump; 11 – engine mount arm

Support oil level in a case of the engine near the tag "П" of a masloizmeritelny core 3 (see fig. 2.1). Measure oil level in 2–3 min. after a stop of the heated-up engine. Do not pour oil above the tag "П" as it will lead to increase in spraying of oil and, as a result, to coking up of rings, a nagaroobrazovaniye in the combustion chamber of a head of the block of cylinders and on the bottoms of pistons, an oil leak through epiploons and laying. Lowering of the level of oil below a tag "About" can put engine bearings out of action.
At pressure difference of oil of 58-73 kPa (0,6–0,7 kgfs/cm2) to the filter and after it. For replacement of the filter unscrew it rotation counterclockwise.
At installation of an oil filter you watch that rubber sealing laying was in a special groove of the case of the filter.
At operation of the car you monitor operation of sensors of pressure of oil. The sensor of emergency pressure of oil works at pressure drop in system to 39–78 kPa (0,4–0,8 kgfs/cm2).
At inclusion of ignition the lamp of emergency pressure of oil lights up, and after launch of the engine dies away. Burning of a lamp on operating modes indicates malfunction of the sensor or lubricant system of the engine.

Fig. 2.10. Scheme of ventilation of a case of the engine: 1 – depression regulator; 2,3 – pipelines

At the raised oil consumption (and lack of a leak) check serviceability of system of ventilation of a case (fig. 2.10) and a condition of sealing caps, valves and tsilindro-piston group.